{"id":"F2006B06836","name":"AD/SD3-30/34 - Autofeather System Wiring","slug":"ad-sd3-30-34-autofeather-system-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114700,"registerId":"commonwealth-F2006B06836-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-30/34 - Autofeather System Wiring","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Short SD3-30 Series Aeroplanes\n\n \n\nAD/SD3-30/34 Autofeather System Wiring 1/99\n\nApplicability: All SD3-30 aircraft that have incorporated Shorts Service Bulletin (SB) SD330-30-30 Original Issue dated June 1988.\n\n \n\nRequirement: 1. Rewire the aeroplane in accordance with Shorts SB SD330-30-30 Revision 1 dated September 1997.\n\n \n\nNote: CAA(UK) AD 003-06-98 and Shorts Mandatory Service Bulletin SD330-30-33 dated June 1998 refers.\n\n \n\nCompliance: 1. Before 31 March 1999.\n\n \n\nThis Airworthiness Directive becomes effective on 28 January 1999.\n\n \n\nBackground:  Incorporation of Shorts SB SD330-30-30 Original Issue resulted in wiring changes that inhibited the operation of the autofeather system. Rewiring in accordance with Revision 1 of the service bulletin restores autofeather system operation.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific wiring defect in a specific aircraft type. It has not expanded beyond its original purpose of correcting the autofeather system wiring error."},"complexity_factors":["Single, unambiguous operative requirement (one rewiring task)","Only one defined applicability criterion (aircraft with specific 1988 service bulletin)","No nested exceptions or conditional logic","No cross-references to other legislation sections","Short document (under 200 words of substantive content)","Single compliance deadline with no alternative methods"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** Orders owners and operators of specific Short SD3-30 aircraft to rewire their planes' autofeather systems. The autofeather system automatically adjusts propeller blades to reduce drag if an engine fails — a critical safety feature.\n\n**Why it's needed:** A previous wiring change (made under an earlier service bulletin from 1988) accidentally disabled this safety system. This directive fixes that mistake by requiring rewiring according to updated instructions from September 1997.\n\n**Who must comply:** Anyone operating SD3-30 aircraft that had the 1988 wiring modification installed.\n\n**Deadline:** The rewiring had to be completed before 31 March 1999.\n\n**Why it matters:** Without this fix, pilots could lose engine power without the automatic safety response that helps keep the aircraft controllable during emergencies."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The AD narrows corrective scope to aircraft that adopted the Original Issue of SB SD330-30-30 and mandates rewiring per Revision 1 because the Original Issue produced wiring changes that inhibited the autofeather system; the AD therefore modifies the post-service state created by the Original Issue and requires restorative work (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability: applies only to SD3-30 aircraft that incorporated SB SD330-30-30 Original Issue (Applicability).","Single, specific corrective action: a rewiring to match Shorts SB SD330-30-30 Revision 1 (Requirement).","Clear fixed deadline: compliance required before 31 March 1999 (Compliance).","Technical dependency on a manufacturer service bulletin revision (Requirement and Background).","Regulatory cross-references: notes CAA(UK) AD 003-06-98 and Shorts SB SD330-30-33 (Note).","Operational consequence identified in source: original SB wiring inhibited autofeather; Revision 1 restores operation (Background)."],"plain_english_summary":"**What it does:** Requires owners/operators of SD3-30 aircraft that incorporated Shorts Service Bulletin SD330-30-30 (Original Issue, June 1988) to rewire the autofeather system in accordance with Shorts SB SD330-30-30 Revision 1 (September 1997) by 31 March 1999. This corrects wiring changes from the original bulletin that inhibited autofeather operation; affected operators must schedule and pay for the rewiring work to restore the system."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-30-34-autofeather-system-wiring","history":"/api/acts/ad-sd3-30-34-autofeather-system-wiring/history","analysis":"/api/acts/ad-sd3-30-34-autofeather-system-wiring/analysis","conflicts":"/api/acts/ad-sd3-30-34-autofeather-system-wiring/conflicts","importantCases":"/api/acts/ad-sd3-30-34-autofeather-system-wiring/important-cases","documents":"/api/acts/ad-sd3-30-34-autofeather-system-wiring/documents"}}